Globe.



No. 637,237. Patented Nov. 2!, I899.

T. H. COSTELLO.

i(No Model.) 2 Sheets-Sheet I.

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. T. H. COSTELLO.

' GLOBE.

(Application filed my 22, 1899. (No Model.) 2 Sheets-Sheet 2.

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* UNITED STATES PATENT OFFICE.

THOMAS H. COSTELLO, OF oHIoAoo, ILLINOIs.

GLOBE.

SPECIFICATION forming part of Letters Patent No. 637,237, dated November 21, 18 99.

Application filed May 22, 1899. Serial No. 717,709- (No model.)

To all whom, it may concern.-

Be it known that I, THOMAS H. COSTELLO, residing at Chicago in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Globes, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to globes, and has for its object to so secure a ring around a globe that it can be adjusted in various positions with relation to the globe, so that it may serve as a horizon-circle, a meridian-circle, a day-and-night circle, and an equatorial circle, and, in fact, at any desired inclination, and which may also be rotated on a vertical pivot around the globe in whatever adjusted position the ring may be. I accomplish this object as illustrated in the drawings and hereinafter described.

That which I claim as'new will be pointed out in the claims.

In the accompanying drawings, Figure 1 is an elevation showing the ring adjusted to serve as a meridian-circle, a front view of such ring being shown. Fig. 2 is an elevation showing the ring adjusted to serve as a day-and-night circle, an edge view of such ring being shown, and in dotted lines is shown the position of the ring when adjusted to serve as an equatorial circle. Fig. 3 is an elevation showing the ring adjusted to serve as a horizon-circle. Fig. 4 is a detail of the devices for adjusting the ring and holding it in position, and Fig. 5 is a section at line 5 5 of Fig. 4:.

6 indicates a standard, projecting upward from which is a stud 7, to which is rigidly secured a short curved arm 8, that supports at the proper inclination the axis of the globe 9, which is rotatable on such axis.

10 indicates a sleeve loosely mounted on the stud 7 and having attached to or formed with it a semicircular support 11 for the adjustable ring.

12 indicates the adjustable ring, to which is suitably connected another ring 13 to form a twilight-circle, as is well known, such twilight-circle ring being at the proper distance from the ring 12. The ring 12 is pivotally at tached to the support 11, the form of attachment'shown being by pins 14, projecting inwardly at opposite sides from the ring 12 and resting in slots 15, formed in the ends of the support 11. The ring can by reason of such pivotal connection befreely turned at any angle with relation to the globe; but to retain it in any desired position I provide a holding or locking device consisting of a segment 16, depending from the ring 12, and aflat spring 17, free at one end and bearing against the face of such segment, as clearly .shown in Figs. 4 and 5. As shown, the segment is firmly braced by being attached at its central portion to the twilight-circle ring 13, and it is provided with a number of hollows or indentations, into which a projection 19 on the spring is'adapted to enter, the indentations being so arranged as to hold the ring 12 parallel with certain principal circles on the globe, and, if desired, an indentation may be provided for the spring to engage when the circle is placed in a vertical position, as in Figs. 1 and 2, although in practice I have not found that it is necessary, as the ring is easily maintained in I such vertical position without such locking. While the means shown and described for locking the ring are sufficient to hold it in any position to which it may be adjusted, the locking of the parts together is not of such a character as to prevent the ready and easy turning of the ring on its pivotal pins 14 from one position to another, as a slight pressure by the hand of the user on the ring will cause the segment 16 to turn and disengage the spring 17 from the indentation 18, in which it rests.

To allow the ring to assume a vertical position, as shown in Figs. 1 and 2, an opening 20, Fig. 3, is made in the twilight-ring 13, and opposite to such opening a bend 21 is made in the ring 12, which bend 2i fits around the collar 10 on the stud 7, and by reason of such bend the usual marks and figures appearing on the face of the ring 12 can still be applied at that point.

The support 11, on which the ring is piv= oted, being attached to or formed with the sleeve 10, that is loosely mounted on the stud 7, it follows that no matter to what position the ring is turned on its pivot-pins 14 it can also be freely turned around the globe by the turning of the sleeve on said stud, and from the various positions to which said ring can be adjusted and turned with reference to the globe it is evident that it can be put to use in the solving of many problems not easily performed with the use of a globe having a fixed ring.

That which I claim as my invention, and desire to secure by Letters Patent, is-- 1. The combination with a globe, of an encircling ring, a support for the ring, a pivotal connection between the ring and support, and a spring arranged between said support and ring for holding the latter in any position to which adjusted, substantially as and for the purpose described.

2. The combination with a globe, of an encircling ring, a support for the latter, a pivotal connection between the ring and support, 

